Focal Scala Utopia Owners - I Need Your Help

Hi,

I currently have the Focal Diablo. I am moving to a new place and the listening room (also living room) is 13'W x 20'L x 9'H. One of the side walls has an opening that is 5 feet wide leading to the dinning room.

I am thinking about getting a pair of Scala. Would the room be too small for the Scala? Would they look too imposing (I have not seen the speakers so don't know how big they look in real life) and would the sound overwhelm the room?

Another concern I have is that my in-laws live downstairs. Would the sound especially the bass travels downstairs? I mostly listen at low and moderate volumes and I am thinking about adding another ceiling within the ceiling downstairs and also use green glue.

Finally, I am thinking about driving the speakers using Pass Labs XA60.5 or the XA100.5. Do any of you currently use the amps to drive the Scala? Please share your thoughts.

Thanks very much in advance!